Question

As different tissues (fat and water) begin to dephase (fall out of phase), spin-spin interactions must reach an amplitude of _________% to be considered T₂ weighted

A) 25%
B) 50%
C) 75%
D) 100%

Answer 1

To be considered T2 weighted in MRI, the dephasing due to spin-spin interactions must reach an amplitude of 50%, based on the specific properties of tissue contrast in MRI imaging.

Step-by-step explanation:

The question pertains to Magnetic Resonance Imaging (MRI), specifically the concept of T2 weighting in image contrast. In MRI, different tissues such as fat and water dephase at different rates due to spin-spin interactions. For an image to be considered T2 weighted, the spin-spin interactions must reach a point where the contrast between tissues is pronounced due to these interactions. The amplitude of this dephasing should be around 50% to achieve a T2 weighted image. This figure is not directly derived using the probabilistic interpretation of the quantum mechanical wave function; rather, it is based on empirical observations and the effective use of the MRI technology.